
import React from 'react'
// 编写组件
class App extends React.Component {
  constructor() {
    super()
    this.state = {
      message: 'Hello create-react-app'
    }
  }
  render() {
    const { message } = this.state
    return (
      <div>{ message }</div>
    )
  }
}

export default App